import java.util.Scanner;

public class Leapyear {
    public  static  void main(String[] args){
        Scanner scan = new Scanner(System.in);
        int year = scan.nextInt();
       if((year % 4==0)&&(year % 100!=0) ||(year %400 ==0)){
           System.out.println(year +"是闰年");
       }
       else{
           System.out.println(year +"不是闰年");
       }
    }
}
